The draft guidance includes notes on the processing of biometric data and age verification intended to protect children online. In ensuring compliance, global biometric standards come into play. The guidance says that “in order to avoid any future interoperability challenges, Data Controllers and/or Processors are advised to adhere to the released standards and other future standards.” It lists ISO/IEC 39794-1, ISO/IEC 39794-4 and ISO/IEC 39794-5, among others. It also includes a compliance checklist for service providers.